RU167732U1 - Cable vibration isolator - Google Patents

Abstract

The utility model relates to vibration isolating devices and can be used in any field, for example, shipbuilding, aircraft building, astronautics, nuclear energy, power engineering, automotive, in the field of underground and ground rail transport to protect various objects from vibration, shock and shock, as well as sound insulation The rope vibration isolator contains an elastic element, two pairs of supporting outer and inner plates with transverse grooves made on the inner plates, fixing means, for example p, screws for fixing the steel rope of the elastic element, soft than the material of the steel rope and support plates, gaskets with the ability of internal damping, while the thickness of the gaskets is selected from the condition of the gap between the outer and inner support plates in the range 0.04-0, 08 from the diameter of the holes of the grooves for steel ropes after the final assembly of the vibration isolator. The technical result of the utility model is to increase the reliability of fixing the rope in the supporting elements of the rope vibration isolators, increasing the determination of their service life and the provision of sound insulation of a depreciated object approximately in the range from 1 to 5 dB.

Description

The utility model relates to vibration isolating devices and can be used in any field, for example, shipbuilding, aircraft building, astronautics, nuclear energy, power engineering, automotive, in the field of underground and ground rail transport to protect various objects from vibration, shock and shock, as well as sound insulation .

Cable vibration isolators are widely known from information sources, for example, [1-4].

Known cable vibration isolators contain an elastic element in the form of segments of a steel rope [1] or in the form of spirals from a steel rope [2-4], two pairs of round and annular ones [1-4, FIG. 2, 6,7] and rectangular [4, FIG. 1, 3-5] plates - outer and inner, respectively, with radial [1-3, 4, fig. 2, 6,7] or transverse [4, FIG. 1, 3-5] grooves for grasping and fixing the segments of the rope [1] or turns [2-4] of the spiral from two diametrically opposite sides, fastened together by fastening means.

Also known vibration isolator [5 (prototype)].

The vibration isolator [5] contains an elastic element in the form of a spiral from a steel rope, a pair of outer and a pair of inner plates fastened together by fastening means. The inner plates are made with grooves for grasping and fixing the steel rope from two diametrically opposite sides.

The distance from the chord or otherwise from the inner surface of the plate to the axis of the hole is:

L = (0.3-0.4) d,

where d is the diameter of the hole.

The disadvantages of the known cable vibration isolator [5] are:

1. Insufficient reliability of fixing the steel rope in the holes of the inner plates.

2. Low property for sound insulation of the depreciable object.

The insufficient reliability of fixing the steel rope in the holes of the inner plates is explained by its structure - twisted (twisted) from tightly laid groups of steel wires. Therefore, the possibility of increasing the density of the wires within the hole is limited. That is, to reorient the wire of the rope after assembly, as shown in FIG. 5 prototype [5], it is difficult.

In addition, the tight contact of the wires with each other and with the supporting elements within the hole can lead to breakage of individual wires.

Since there is no gap between the outer and inner supporting elements, i.e. they are in close contact with each other, the high-frequency damping of the steel rope within the holes of the internal supporting elements during vibration isolation is excluded. Therefore, the known vibration isolator [5] does not have soundproofing properties.

The proposed utility model is aimed at eliminating these shortcomings of the known vibration isolator and its improvement.

The technical result of the utility model is to increase the reliability of the fixation of the rope in the supporting elements of the rope vibration isolators, increase their service life and ensure sound insulation of the shock-absorbed object.

The technical result is achieved in that in a section of a circle torn along the chord from the side of the inner surface of the inner plates between the ropes and the inner outer support plates, soft gaskets are installed than the material of the steel rope and the support plates, having the ability of internal damping. The thickness of the gaskets is selected from the conditions for the formation of a gap between the outer and inner support plates in the range of 0.04-0.08 from the diameter of the holes of the grooves for steel ropes after the final assembly of the vibration isolator.

After the installation (placement) of rope elastic elements in the holes of the grooves of the inner plates, the outer pairs of plates are fastened to the inner pairs of plates using fasteners. In this case, the gasket under pressure conditions acts on the steel rope on one side, locking the torn part of the circumference along the chord, blocking the rope on all sides, on the other hand, “flows” and partially fills the free gaps (bumps) formed between the strands and wires.

Thus, due to the use of gaskets made of softer materials, which are able to “leak” under the influence of pressure, the steel cable is fixed and fastened and the service life of the vibration isolator is increased.

The soft gasket material, which has the ability of internal damping, and the gap that excludes direct contact of the outer and inner support plates, in contrast to the prototype [5], favorably improve the soundproofing properties of the vibration isolator.

The presence of the specified gap in the proposed technical solution, unlike the prototype [5], also provides the possibility of elastically damping alternating movement of the wire of the rope in the high-frequency region in the transverse grooves of the internal support plates during operation of the vibration isolator under the action of forcing forces and moments of the shock-absorbing object or under the action of pulses arising in the housing , for example, a vessel both during its movement and under the effect of random shaking on it.

The essence of the utility model is illustrated by drawings, which depict:

in FIG. 1 is a view of a cable vibration absorber with rectangular plates;

in FIG. 2 is a view of a cable vibration absorber with round plates and arcuate segments of a steel rope;

in FIG. 3 is a view of a toroidal vibration absorber with round plates;

in FIG. 4 is a view (part) of an inner plate with a groove inside which a rope is placed in a free state (cross section), an outer plate and fastening means in a free state, and in FIG. 5 - rope in a tightly clamped (working) state.

The rope vibration isolator contains an elastic element 1, two pairs of supporting outer (2, 4) and inner (3, 5) plates with transverse grooves "A" (Fig. 1-5), made on the inner plates (3, 5), fixing means for example, screws 6 for fixing the steel rope of the elastic element 1, a gasket 7 made of materials softer than the material of the steel rope 1 and the support plates 2-5.

The grooves A in the inner plates 3, 5 are made in the form of a circular hole circumference torn along the chord of the aircraft (Fig. 4, 5). The distance L (Fig. 4, 5) from the chord BC (Fig. 4) or otherwise from the inner surface of the plate 3 (or 5) to the axis O of the hole is:

L = (0.15-0.3) d,

where d is the diameter of the hole (Fig. 4, 5).

This distance is selected depending on the design of the rope according to the assortment and can be verified empirically.

This distance L (Fig. 4, 5), respectively, increases the thickness of the inner plates 3, 5 (Fig. 1-5), therefore, their rigidity. In this case, the thickness of the outer plates 2, 4 (Fig. 1-5) decreases by the value of the radius of the circle A or can be increased as necessary.

In FIG. 5F is the gap between the inner 3, 5 and outer 2, 4 plates.

The gap F (Fig. 5) is provided by the thickness of the strip 7 (Fig. 1-5) by calculation or empirically.

The gasket 7 is also an acoustic barrier that prevents the direct contact of the support plates 2, 4 and 3, 5 (Fig. 1-5).

When the outer plates 1 and 2 are pressed against the inner plates 3 and 4 by fastening means 6 (Fig. 4, 5), the strands with wires relative to each other begin to condense, gradually occupying an empty space. With further tightening of the fastening means 6, the static loading - pressure force increases and the gasket 7 "flows", partially filling the free gaps (bumps) formed between the strands and wires of the steel rope.

The plane of contact of the strip 7 with the wires acquires a quasi-wave-like shape (see Fig. 5).

Thus, the contact plane of the strip 7 (Fig. 5) is partially located in a section torn along the BC chord — the neck with a quasi-wave-like plane and provides reliable fixation and fastening of the elastic rope element 1 (Fig. 1-5).

It should be noted that the proposed technical solution extends not only to vibration isolators, presented as examples in FIG. 1-3, but also on other cable and combined vibration isolators with composite structures of the base plates.

The applicant is not aware of any technical solutions containing features identical to those of the proposed invention: what determines, according to the applicant, whether the invention meets the criterion of “novelty”.

The implementation of the differences of this utility model (in conjunction with the characteristics given in the distinctive part of the formula) ensures the achievement of new properties (technical effect) of the claimed object:

1. Significantly increases the uniformity and reliability of the fixation of the rope in the grooves And the inner plates 3, 5 (Fig. 1-3, 5);

2. The technology of manufacturing cable vibration isolators is simplified.

3. Achieved high efficiency of vibration protection of the vibration isolator (from 15 to 50 dB).

4. A sound insulation of the depreciable object is achieved from about 1 to 5 dB.

Information sources

1. Vibration isolating support of the internal combustion engine. RF patent No. 2037691, cl. F16F 7/14. 06/19/1995 Bull. No. 17 (Fig. 1, 2).

2. Vibration isolating engine support. RF patent №2040716, cl. F16F 7/14. 07/27/1995 Bull. No. 21 (Fig. 1, 2).

3. Vibration isolating support. RF patent No. 2219395, cl. F16F 7/14. 12/20. 2003 bul. No. 35 (Fig. 2, 3).

4. Vibration isolating support of the internal combustion engine. RF patent No. 2185534, cl. F16F 7/14. 07/20/2002 Bull. No. 2 (Fig. 1-8).

5. Rope vibration isolator. RF patent No. 2478845 class. F16F 7/14. 04/10/2013 Bull. No. 10 [(Fig. 1-5), prototype].

Claims (1)

A rope vibration isolator containing an elastic element in the form of a spiral from a steel rope, a pair of outer plates, a pair of inner plates, fasteners, grooves made in the form of a circular torn circle along the chord of the circumference from the side of the inner surface of the inner plates of the hole for gripping and fixing the steel rope from two diametrically opposite sides, characterized in that in a section of a circle torn along the chord from the side of the inner surface of the plates between the ropes and the inner outer plates installed They are softer than the material of the steel wire rope and support plates, the gaskets are capable of internal damping, and the thickness of the gaskets is selected from the condition of the formation of a gap between the outer and inner support plates within 0.04-0.08 of the diameter of the holes of the grooves for steel cables after final assembly of the vibration isolator.

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